Home / 15,128.98-20,876.30-9,077.99

Finding the Fourth Proportional to 15,128.98, 20,876.30 and 9,077.99

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Solution

The fourth proportional to 15,128.98, 20,876.30 and 9,077.99 is: 12,526.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.98 : 20,876.30 = 9,077.99 : x
  2. Step 2: Convert to fraction form
    15,128.98/20,876.30 = 9,077.99/x
  3. Step 3: Cross multiply
    15,128.98x = 20,876.30 × 9,077.99
  4. Step 4: Simplify right side
    15,128.98x = 189,514,849.44
  5. Step 5: Solve for x
    x = 189,514,849.44/15,128.98
  6. Step 6: Final answer
    x = 12,526.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.